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湖南省耕地土壤有效硫 (S)含量在 6 .6～ 2 6 5 .1mg/kg之间 ,平均为 36 .8mg/kg ,其中低于 1 6mg/kg的土壤占 2 0 .9%。土壤有效硫含量以湘西和湘北较高 ,湘东和湘南较低。 8种成土母质发育的土壤有效硫含量高低次序为 :石灰岩 >第四纪红土 >砂岩 >花岗岩 >河流冲积物 >湖积物 >板页岩 >紫色砂页岩。水稻在有效硫低于 1 6mg/kg的土壤上施硫增产效果较大 ,平均增产 1 2 %。油菜在有效硫低于 2 9mg/kg的土壤上施硫仍有增产效果 ,平均增产 1 5 .7% ;花生施硫平均增产 7%。硫磺、石膏、普钙对油菜和花生的肥效几乎相当
The soil available sulfur (S) content of cultivated land in Hunan Province was between 6.6-265.1 mg / kg, with an average of 36.8 mg / kg, of which 20.9% of the soil was below 16 mg / kg. Soil available sulfur content in western Hunan and northern Hunan higher, lower in eastern Hunan and southern Hunan. The order of soil available sulfur content for the development of eight soil parent materials is limestone> Quaternary laterite> sandstone> granite> river alluvial sediments> lake sediments> slate shale> purple sandstone shale. The effect of applying sulfur fertilizer on paddy soil with available sulfur less than 16mg / kg was larger, with an average increase of 12%. Rapeseed still had an increased yield of sulfur in soils with effective sulfur below 29 mg / kg, with an average increase of 15.7%. Peanut application of sulfur increased by an average of 7%. Sulfur, gypsum, calcium supplement on rapeseed and peanut almost equally effective